nativelibc/process/getpid.c

#include <windows.h>
#include <nt.h>
#include <unistd.h>

pid_t getpid() {
	PROCESS_BASIC_INFORMATION pbi;
	NtQueryInformationProcess((void *)-1, ProcessBasicInformation, &pbi, sizeof pbi, NULL);
	return pbi.UniqueProcessId;
}

pid_t getppid() {
	PROCESS_BASIC_INFORMATION pbi;
	NtQueryInformationProcess((void *)-1, ProcessBasicInformation, &pbi, sizeof pbi, NULL);
	return pbi.InheritedFromUniqueProcessId;
}